I designed integral state feedback system and implemented in Simulink. There's an error. can you help me to fix it$.$

Here's an errors below.

Error in port widths or dimensions. $\text{'}1\text{'}$ of 'simulink model$/$Integrator$\text{'}$ is a one dimensional vector with $4$ elements.

$$: Simulink $|$: Model $$

Error in port widths or dimensions. $\text{'}1\text{'}$ of 'simulink$\_$model$/$Gain$3\text{'}$ is a one dimensional vector with $3$ elements.

$$: Simulink $|$: Model $$